Also, Lawrence of Arabia. (WWI)
I recently saw Enemy at the Gate, with Jude Law and Ed Harris, about that Soviet sharpshooter. Good movie!
Quickie plot summary: Peter O'Toole gets corn-holed by Jose Ferrer and later Peter leads the Arabs against the Turks as revenge for the backdoor entry.
Bizarre historical footnote: Many historians subsequently cast doubts on Lawrence being buggered by a Turk captor as he stated in his book which makes Lawrence one of the few who possibly covered up the fact that he DIDN'T have a rear door violation.